Question

drag the vertices of △def to form an equilateral triangle.

Explanation:

Step1: Recall equilateral - triangle properties

An equilateral triangle has all sides equal and all angles equal to 60°.

Step2: Adjust vertices

Drag the vertices D, E, and F such that the lengths of DE, EF, and FD are equal (e.g., make each side length the same value). Also, make sure that ∠D = ∠E=∠F = 60°.

Answer:

Drag the vertices to make all side - lengths equal and all angles 60°.